Backlight Membrane switch keypad, this backlight means adding components to the membrane switch that can illuminate the front surface of the user interface. This light can be concentrated in a specific area when activated, or the entire display area when the device is used.

The types of backlighting technologies, include Light Guide Film (LGF), Light Emitting Diodes (LED), Electroluminescent (EL) Lighting, and Fiber Optic Backlighting.

The backlight Membrane switch usually is used in a dark environment, it can see the button clearly for location and other marks. This makes operation easily and improves the view effects of the switch keypad and its quality.